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Each of the above stated demands can be carried out on single
ingredient parts of the cartographic presentation, but it is much
more adequate to do it through their purposeful combining. It
has quite certainly much greater importance for the formation of
the efficient cartographic visualisation, and thus also for the
cartographic presentation appropriate to the user. In the process
of carried out research (Franges 1998, 2000a, 2000b, 2002;
Franges et al. 2000, 2001a, 2001b) the following demands were
made for map visualisation: legibility, clearness, accuracy,
plainness, and aesthetic. Their realisation requires the fulfilment
of some conditions (Figure 3).
The order of the above stated demands is not especially
important, because some demands are overlapping in part, and
some are mutually opposed or set additional conditions for their
successful realisation.
LEGIBILITY
- minimal sizes
- graphic density
- diferentiation of
known features
CLEARNES
- simplicity
- contrasting quality
- layer arrangement
ACCURACY AESTHETIC
- positioning - harmony
accuracy - beauty
- accuracy signs
PLAINNESS
- symbolism
- traditionalism
- hierarchic
organisation
Figure 3. Demands posed upon cartographic visualisation
and conditions that should be fulfilled
in order to meet these demands
Good cartographic visualisation with adequate resolution, well-
defined symbols, harmonious usage of colour, good legibility
and optimally placed titles and optimal graphic density attracts
users and gives them more information more quickly. Thereby it
is especially important to apply colours systematically, e. g.
according to the principle of similarity with the real situation in
the nature or by adopting symbols. Also, the same objects
should be presented in the same colour, different colour
intensity should be associated according to the importance of an
object, etc. The appearance of symbols should be almost
perfect, because with their ability to express and save space on
the map they can replace the presentation similar to plan with a
description or they can intervene with additional information.
Map symbols can vary differently, e. g. size, shape or colour, so
that the map appearance be optimal.
4.3 Some examples
The most important changes in cartography are connected with
the development of computer technology and GIS, and with
regard to the function and usage of maps, the accent is given to
cartographic visualisation. New encouragement to the
visualisation of GIS-data comes from animation, multimedia
presentation, Internet, WWW etc. Some examples of various
possibilities in cartographic visualisation are given further in the
text. Figure 4 shows the interactive internet map of Dubrovnik
(Zupan, 2003). Figure 5 shows VIP navigator uses GIS tools
(VIP, 2003). Figure 6 gives the segment of the visualisation of
GIS of cultural and historical objects in the centre of the city of
Zagreb (Vukadinovié, 2003).
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Figure 5. VIP navigator uses GIS tools.
S. CONCLUSION
Modern cartography has the task to develop and research new
methods of cartographic visualisation. For that purpose the
knowledge about cartographic presentation of geoinformation
must be connected with the contemporary digital techniques of
visualisation. The most powerful connections between
cartography and GIS are exactly cartographic visualisation tools
and their possibilities of presenting the data of synthesis and
analysis derived from GIS.